Command to determine if a file is open for writing? By any user?

beadyell

Is there a command where you can specify a file name / path and find out if any user currently has that file open for writing?

I'm trying to rein in a loader program that sometimes 'jumps the gun' and tries to read a file before it's finished.

bingrenling

So, you would use lsof.

lsof | grep filename